Mishra, Eminent One + Urza, Lord High Artificer + Worldwalker Helm + Alibou, Ancient Witness

Mishra, Eminent One

Urza, Lord High Artificer

Worldwalker Helm

Alibou, Ancient Witness

How it works

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Worldwalker Helm that is a 4/4 Construct artifact creature with haste named Mishra's Warform, and a Map token.
2. Activate Urza's first ability by tapping a Map, adding .
3. Activate Mishra's Warform by paying 1 and tapping it, creating a token copy of it and a Map token for each Mishra's Warform and/or Worldwalker Helm you control.
4. Activate Urza's first ability twice by tapping two Maps, adding .
5. Repeat from step 3.

This engine spins into motion thanks to Mishra, Eminent One, which turns Worldwalker Helm into a 4/4 copy named Mishra's Warform at the start of combat, instantly triggering the Helm's replacement effect to double your token generation into an extra Map token. Urza, Lord High Artificer anchors the mana production by turning those newly minted Maps into a blue mana source simply by tapping them, which funds the Mishra's Warform's own activated ability to copy itself over and over. As the loop spirals out of control, Alibou, Ancient Witness ensures your growing army of artifact creatures starts the game with haste and can immediately hurl lethal damage and sculpt your draws through scrying based on your tapped artifacts.